skip to content

Darwin Correspondence Project

Search Results

Darwin Correspondence Project
Search:
"Darwin C R" in search-correspondent [X]
Darwin, C. R. in correspondent [X]
Köppen, F. T. in correspondent [X]
4 Items
Sorted by:  
Page: 1

To F. T. Köppen   28 April [1871]

Summary

Thanks for FTK’s locust paper ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)].

Author:  Charles Robert Darwin
Addressee:  Friedrich Theodor Köppen (Fedor Petrovich Keppen)
Date:  28 Apr [1871]
Classmark:  Archive of the Russian Academy of Sciences, St Petersburg branch: SPBB ARAS (Fond 92. Register 1. Folder 112. P. 1, 1 r)
Letter no:  DCP-LETT-7723

To F. T. Köppen   18 November 1874

Summary

Thanks FTK for telling him of Jahn’s work [see 9719], of which CD had not heard. It would have been of greatest use in writing Descent.

Author:  Charles Robert Darwin
Addressee:  Friedrich Theodor Köppen (Fedor Petrovich Keppen)
Date:  18 Nov 1874
Classmark:  Archive of the Russian Academy of Sciences, St Petersburg branch: SPBB ARAS (Fond 92. Register 1. Folder 112. P. 3, 3 r)
Letter no:  DCP-LETT-9722

From F. T. Köppen   25 April 1871

Summary

Sends his paper on locusts ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)]. The effect of the growth of forest land on their increase; meteorological and climatic effects.

Also observations made on increase in mice as a result of increase of locusts, on whose eggs they fed, and of increase of weasels that fed on mice.

Author:  Friedrich Theodor Köppen (Fedor Petrovich Keppen)
Addressee:  Charles Robert Darwin
Date:  25 Apr 1871
Classmark:  DAR 46.1: 102
Letter no:  DCP-LETT-7716

From F. T. Köppen   13 November 1874

Summary

Calls CD’s attention to a book that deals with subjects related to both Descent and Expression: Ferdinand Jahn, Die abnormen Zustände des menschlichen Lebens als Nachbildungen und Wiederholungen normaler Zustände des Thierlebens [1842].

Author:  Friedrich Theodor Köppen (Fedor Petrovich Keppen)
Addressee:  Charles Robert Darwin
Date:  13 Nov 1874
Classmark:  DAR 91: 84
Letter no:  DCP-LETT-9719
Document type
letter (4)
Addressee
Correspondent
Darwin, C. R.[X]
Köppen, F. T.[X]
Date
1871 (2)
1874 (2)
letter